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E_FDPAIRING_AUTHNOTALLOWED
E_FDPAIRING_AUTHNOTALLOWED belongs to Function Discovery and PnP-X device pairing. It marks the device or host policy does not permit the requested authentication method. The useful starting point is the exact API, object and state transition that returned 0x8FD00006, because a shell or application message can hide that boundary.
Where this result is raised
Function Discovery separates discovery from association and installation., a device can be visible yet reject a connection, complete discovery but fail authentication, lack a usable profile, or depend on a disabled PnP-X bus component. During a this result investigation, pairing evidence must therefore distinguish host policy, provider state, network reachability, device capacity and user-confirmation outcomes.
When it is returned, the ceremony may be technically supported but disabled by device mode, enterprise policy, account role, transport profile or required physical-presence state.
The first owner to inspect is the discovery provider, pairing handler, association database, network protocol, device ceremony, or PnP-X bus component that returned the HRESULT.
Evidence worth collecting
- Requested authentication method. for it, this separates caller input from environment and service state within the Function Discovery and PnP-X device pairing boundary.
- Device mode and policy. for it, this creates a stable comparison across retries or another machine within the Function Discovery and PnP-X device pairing boundary.
- Host enterprise/device-install policy. for it, this pins the event to an object or resource generation within the Function Discovery and PnP-X device pairing boundary.
- User role and physical-presence requirement. for it, this places the event on the lifecycle or transaction timeline within the Function Discovery and PnP-X device pairing boundary.
A controlled diagnostic sequence
During a this result investigation, reduce the case while preserving the condition described by the HRESULT.
- First: Select a permitted documented ceremony.
- Next: Check device discoverable/pairing mode.
- Then: Review applicable host policy.
- Finally: Keep policy denial separate from bad credentials.
How to interpret comparison tests
| Control | Interpretation | Hold constant |
|---|---|---|
| Same input, fresh object or connection | If the result disappears, retained lifecycle or ownership state is implicated. | While diagnosing this result, keep the original data, account, device, or timeline parameters unchanged. |
| Same object, reduced operation | If the result follows one specific transition, statement, file, or ceremony step, the failure is localized. | While diagnosing this result, remove only unrelated work and keep the first failing boundary visible. |
| Same device, controlled host or network | A change separates device-side state from host provider, policy and transport. | While diagnosing it, keep firmware and ceremony type fixed. |
What this code does not justify
AUTHFAILURE means an allowed method failed; AUTHNOTALLOWED means the method or operation is prohibited.
Do not weaken global device-install or authentication policy for one device.
Verification after correction
Treat it as corrected only when an approved method succeeds while prohibited methods remain denied by policy; retain the original negative case so fallback cannot be mistaken for repair.
Technical references
The references below define the API family or storage/protocol behavior used to interpret it.
- Microsoft Win32 metadata: winerror.h
- Microsoft: IFunctionDiscoveryProvider
- Microsoft: IPNPXDeviceAssociation
- Microsoft: Using Function Discovery providers
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